<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>生命周期</title>
    <script src="../../vue.js"></script>
</head>
<body>
<div id="app">
    <span v-pre>{{book}}</span>
    <span>{{book}}</span>
</div>
</body>
<script>
    //插值表达式
    var app = new Vue({
        el: '#app',
        data: {
            book: '《Vue.js实践》'
        }
    })

</script>
</html>